pease



L t e e h S s t Du nu h 2 Du S A E P m d O M .0 m

SCREW PRESS FOR INSULATORS.

Patented Jan.21, 1890.

WITNESSES Kim/MW 7/ N. PETERS. Phmo-Lllhngnphel. Washington, D.c.

2 Sheets- Sheet 2,

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- J. PHASE.

ScRBW PRESS FOR INSULATORS. No. 419,875. Patented Jan. 21, 1890..

v J RN; m r n K a i WITNESSES.

UNITED STATES ATENT OFFICE.

JACOB PEASE, OF BROOKLYN, ASSIGNOR TO WVILLIAM BROOKFIELD, OF

' NEW YORK, N. Y.

SCREW-PRESS FOR INSULATORS.

SPECIFICATION forming part of Letters Patent No. 419,875, dated January21, 1890.

Application filed November 14, 1889. Serial No. 330,302- (No model.)

To all whom it may concern:

Be it known that I, J ACOB PEASE, a citizen of the United States,residing at Brooklyn, in the county of Kings and State of New York, haveinvented new and useful Improvements in Screw-Presses for Insulators, ofwhich the following is a specification.

This invention relates to presses for making screw glass insulators fortelegraph-lines and other purposes; and it consists in various novelfeatures, hereinafter described, reference being had to the accompanyingdrawings, in which Figure lis a front view of the press. Fig. 2 is avertical section on the line so a: of Fig. 1. Fig. 3 is a horizontalsection on the line 'y y of Fig. 1. Fig. 4 is a horizontal section onthe line .2 z of Fig. 1. Fig. 5 is a vertical section on the line 00 xof Fig. 1, taken when the screw-plunger has been forced down inthe mold.

The press is so constructed that the plunger, which has a screw-threadformed upon it, is thrust into the molten glass or metal in the mold bya direct longitudinal movement and is turned out by a rotary movement ofthe plunger.

In carrying out the invention I provide a frame A, which supports thevarious parts of the press and rises from a platform B, on which themold C is placed.

The letter D designates a spindle, which is guided in the frame A, andwhich on its lower end is provided with a screw-plunger E, its upper endbeing provided with a bent lever F, which is pivoted at its angle by apivot G to the top of the spindle D, while its shorter arm is pivoted bythe pivot H to the upper ends of the arms I I. The arms I are 0011-nected at their lower ends by a pin J to a bracket K, which has arms LL, that are connected to the frame of the machine at M M. The lower endsof said arms I are provided with several holes N, through any of whichthe pin J can be passed, whereby the adjust ment of the arms I with thebrackets can be changed. The outer end of the bracket is, supported bymeans of a rod 0, whose lower end is pivoted by a pivot P to theplatform 13. The upper end of the rod 0 is screwed into the bracket andis secured by a nut Q.

To the shorter arm of the lever F is secured by the bolt and nuts R aweighted arm S, whose weight tends to raise the spindle D after everydescent. In operating the lever F the arms I and red O are free tooscillate on their pivots and connections.

The spindle D is'made in two sections, which are connected to each otheras follows: In the lower end of section T of the spindle is formed asocket U, which receives the upper end of section V of the spindle,which has near the end a circumferential groove WV, which is engaged bythe end of a screw X, which passes through the side of the socket U andenters the groove, so that the lower section V of the spindle is free torotate in the socket of the other section U, and is secured therein bythe end of the screw X. Below this connection the section V of thespindle is provided for a portion of its length with a screw-thread Y,formed of oonicallyshaped teeth. The screw-thread Y is surrounded by asleeve Z, which is secured by a set-screw 1 to a collar 2,surroundingthe spindle, said collar 2 being secured to a cross-- bar 3, thatreceives its support from the posts 4 4 of the frame of the machine.

A pair of teeth 5 5, which are counterparts of the conically-shapedteeth of the screwthread Y, engage the teeth of said screwthread, thesame projecting from the springarm 6 and passing through the sleeve Z.The teeth 5 can be withdrawn from engagement with the screw-thread Y atany time by pulling the spring-arm 6 outward. A bevel gear-wheel 7 issecured upon the spindle below the screw-thread Y, and is engaged by thevertical bevel gear-wheel 8, whose .aXis is supported in a sleeve 9,which is part of the main frame A. The bevel gear-wheel S is turned bymeans of the crank 10, and rotary is suspended from a spring-frameconsisting of the vertical rods 15, which pass upward through thecrossbar 3, which is a guide for them, and their upper ends, which arethread- I ed, pass through a cross-bar 16, which is made to secure therods to the cross-bar at such points as shall secure the proper pressurefrom the springs on the follower.

The operation of the press is as follows: The proper quantity of moltenglass having been gathered in the mold and the mold placed in properposition under the plunger,

the lever F is moved upon its fulcrum H in the direction of the arrow,and thereby the spindle D is moved downward and the screwplunger ispressed into the glass in the mold. In this movement the screw-threadson the spindle slip past the teeth-5 5, which,'being mounted on thespring-arm 6,yield outwardly sufficientlyfor that purpose. The cross-bar16, which, as above mentioned, is of one piece with the top of spindleD, is carried downward with the. spindle, and by its pressure on thesprings 17 17 on the rods 15 15 the followeris pressed downward until itrests on the top of the mold, the springs 17 being arranged on the rodsso as to effect that result. The follower therefore rests upon the moldwith a yielding pressure, and should there be an excessof metal in themold such excess can'escape from the top of the mold, and thus injury'to the press be avoided. The movements of the spindle and follower areso timed that the follower reaches the top of the moldbefore theshoulder 12 of the plunger reaches the former 13, and consequently thecompletion of the'descent of the spindle and plunger takes place afterthe full downward movement of the follower. therefore, after thefollower completes its descent, continues its downward movement andforces the shoulder 12 down upon the top of the former 13, and pressesthe screw-plunger into the glass the required distance to form the screwglass insulator, the extent to which the screw-plunger is pressed intothe glass or mold being limited and controlled by stops 20 20,consisting of arms which extend from opposite sides of the former nearits top over the top of the follower, so that when the stops rest uponthe follower the former, and consequently the shoulder 12 and theplunger, cannot be forced downward any farther. When the screw glassinsulator has been pressed, the lever F is released and the crank 10 isoperated so as to turn the screw-plunger out of the mold, in doing whichthe weight S assists by tending to restore the lever F, spindle D, andthe follower to their normal positions, the springs 17 operating toraise the follower to its position shown in Fig. 1.

The spindle,

The screw-thread Y on the spindle operates as a lock on the spindleand-prevents the spindle and plunger from accidental movements ordisplacements and from backward movements, which would causeimperfections inthe insulators. As the pitch of the screwthreads of theplunger and spindle are the same, their screw-threads work in unison,and no hinderance occurs in turning the plunger out of the glass and atthe same time raising the spindle. The construction and arrangement,moreover, are such that the screwthread on the spindle and thespring-teeth 5 5, which work thereon, do not prevent the directlongitudinal movement downward of the spindle and plunger.

In making screw glass insulators it has been the usual practice to firstpress the glass in the mold with a plain plunger, producing a plain holein the glass, and then to remove the mold to a press by whose operationa screw-thread would be formed in the plain hole previously formed, thususing two presses and two operations. ables one to make screw glassinsulators-successfully in one operation and by the use of only onepress, effecting a saving in time, labor, and machinery andproducinginsulators of satisfactory character.

What I claim as new, and desire tosecure by Letters Patent, is-

1. The co1nbination,in a press formaking screw glass insulators,.of aspindle carrying a screw-plunger, a screw-thread on thespindle having(sonically-shaped teeth, yieldingteeth 5 5,,engaging the screw-thread onthe spin die, and means for imparting both direct longitudinal androtary motions to the spindle and plunger, substantially as described.

2. In a press for making screw glass insulators, the combination of aspindle and screwplunger adapted for both directlongitudinal and rotarymotions, with the bent lever F,

the arms I, rod 0, and weighted arm S, substantially as shown anddescribed.

3. In a press for making screw glass insulators, the combination of thespindle D and plunger E, adapted to have direct longitudinal' and rotarymotion, the mold O, the follower 14, the former 13, provided withlaterally-projecting stops 20, extending over the top of the followertolimit the downward motion of the former and plunger, and the sleeve 11,secured to the spindle and provided with a shoulder 12, that projectsabove said sleeve, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

J AOOB PEASE. Witnesses:

J. VAN SANTVOORD, E. F. KASTENHUBER.

My improved press en-

